The utility model relates to the technical field of bearings, in particular to a self-lubricating bearing which comprises two half bearings which are folded, a shaft passing hole is formed in the center of each half bearing, and a plurality of circumferential groove sections and a plurality of lubricating grooves are concavely formed in the inner side of each half bearing. A plurality of circumferential groove sections and a plurality of lubricating grooves are arranged around the central axis of the shaft passing hole at intervals in an
annular array mode, the circumferential groove sections are communicated with the shaft passing hole through the lubricating grooves, a plurality of involution convex teeth and a plurality of involution tooth grooves are arranged on the periphery of the inner side of the half bearing, and each involution tooth groove is located between every two adjacent involution convex teeth. And when the two half bearings are oppositely combined, the oppositely combined convex teeth of one half bearing are inserted into the oppositely combined tooth grooves of the other half bearing. The two half-side bearings are the same in structure, convenient to produce and manufacture, good in interchangeability and capable of lubricating the rotating shaft, the two half-side bearings are meshed through the involution convex teeth and the involution tooth grooves when involution is conducted, assembling is convenient and fast, and lubricating
oil can be stored in the circumferential groove section easily.